1. The problem statement, all variables and given/known data A simple pendulum, consisting of mass m and a string, swings upward making an angle X with the vertical. What is the work done by the tension force? (answer in terms of mg) 2. Relevant equations W=Fd 3. The attempt at a solution What I need to do is solve for the tension force, which at the bottom of the pendulum is simply mg, right? However I am having trouble determing the distance that the tension force is applied to. Can anyone get me started in the right direction? Thanks.